Tricky Puzzles

 



Here are some simple puzzles...

Puzzle 1.

101 - 102 = 1
Can you make the above equation correct (a) by moving one number? (b) moving a line?

Puzzle 2.
What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Puzzle 3.

You are making a big opaque cube (ie you cannot see through its sides).
It can be any size that you want it to be.
Where would you like to stand so as to see a maximum number of sides?

Puzzle 4.

Find a 10-digit number where the first digit is how many zeros are in the number, the second digit is how many 1s are in the number, etc. until the tenth digit which is how many 9s in the number. 

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